Rerun-still



D. PYZEL.

HERUN STILL.

APPLICATION FILED SEPT. 4, 1919.

Patented June 28, 1921. 2 SHEETS-SHEET I Gow@ wwww/O ..ooQwQ Q o G a H,w I .W QM ON J/ INVENTOR.

DA /v/EL. Ds/zel.,

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jaw/T Q A TTORNE Y.

D. PYZEL RERUN STILL.

APPLICATION man sEPT.4.1919.

Patented June 28, 1921.

2 SHEETS-SHEET 2.

INVENTOR.

DAN/EL. PYZEL,

' BY l Y 4a/y wfw ATTORNEY.

DANIEL '.PYZEL, OF OAKLAND, CALIFORNIA.

RERUN-STILL.

Specification of Letters Patent. Pafented June 28, 1921.

Application led September 4, 1919. Serial No. 321,730.

fining petroleum oils, and the principal object of the invention is toprovide an apparatus by which distillate having a very narrow boilingrange may be produced. It is common practice in the art of distillingpetroleum to take off from the crude oil a considerable number ofdifferent products which differ primarily in their boiling points.',Ihese products have commercial names such as gasolene, kerosene, etc.,and it is highly desirable that the separation should be quite complete,that is to say, it is desirable that kerosene should contain no gasoleneor vice versa.

My invention applies to those processes in which the crude petroleum isfirst topped, that is to say, in which all of its constituents whichwill vaporize at or above a certain boiling point are taken offtogether, the tops so produced containing gasolene, kerosene and variousother products. These tops which are taken off from the primary still inthe form of vapor are then condensed and subjected to fractionaldistillation to divide them into the various desired' commercialproducts.

My invention comprises a re-run still which is especially adapted to theredistillation of such tops for the purpose of separating them into thevarious desired 'commercial products.

Further objects and advantages will be set forth more in detailhereinafter.

Referring'to the drawings which are for illustrative purposes only,

Figure 1 is a vertical section through a .preferred form of myinvention, portions thereof being broken away to better illustrate theinternal structure.- .l

' Fig. 2 is a section on an enlarged scale on a plane represented by theline 2 2 of Fig. 1.

Fig. 3 is a diagrammatic View showing the application of my invention toa system of refining.

The re-run still shown in Figs. 1 and 2 consists of a cylindrical shell11 which is secured by means of angle iron anges 13 at elther end toheads 14. These heads are formed of two plates separated by spacingWashers 15 and clamped together by boltsl. Extensions 17 of the shell 11are also secured to the heads 14, these extensions 17 being closed byends 18. Secured in the heads 14 and extending through the space betweenthese heads, which is hereinafter referred to as the distilling chamber,is a series of tubes 20, these tubes being made oil and gas tight in theheads 14 and connecting with the spaces outside these heads. The tubes20 are preferably placed below a horizontal diameter (1f-a as shown inFig. 2, a series of partitions 21 being secured inside the shell 11, andextending across above the tubes 20 to form a series of progressivespaces. Each of these spaces is provided with a vapor outlet connection22 and with a perforated steam pipe 23, this pipe passing through areducer 24 and extending along the bottom of the shell 11, beingprovided with perforations 25 through which the steam is injected intothe oil. Hand holes 27 are also provided in the top of the shell 11 overeach of the spaces. A condensate inlet 30 is provided in the shell 11Vat the inlet end of the distilling chamber, anda condensate outlet 31is provided in the shell 11 at the outlet end of the distilling chamber.A residuum inlet 33 is provided in the shell 11 for one of the spacesoutside of the heads 14, a residuum outlet 34 being provided for theother space.

The method of operation'is as follows:

The condensate is admitted through the inlet 30', iiowing from left toright as in Fig. 1 through the distilling chamber in which it issubjected to the action of heat due to hot fluid in the tubes 20 and dueto the injection of steam through the perforations 25. Due to theapplication of heat, vapor is produced which rises into the proressivespaces between the partitions 21.

his vapor is taken off through the'vapor taken off at the last of thesespaces may not boil until it is heated to 200 F. The

outlets 22. As the oil Hows longitudinally dierent products or cuts, asthey are called, `are taken olf to condensers, not shown, in which thefinal product is con- ToY better illustrate this method of operation, Ihave prepared the diagram, Fig. 3, which shows diagrammatically arefinery in which 51 is a pipe still, 52 is a vapor separator, 53 is acondenser, 54 is a pump, and 55 is the re-run still just described. The

raw oil is delivered through a pipe 60 to the' pump 54, being forced bythis pump through a series of coils 61 in the still 51 where it issubjected to the action of heat, the heated oil with its included vaporbeing delivered to the top of the vapor separator 52 and passingdownwardly therethrough. The oil is forced outwardly by a series ofcones 62, the. vapor passing inwardly and passing through perforations63 into a pipe 64, being delivered through a pipe 65 to the condenser53, in which it is subjected to the action of cold water carried intubes 66. The uncondensed vapor is withdrawn through apipe 67 and thecondensates aire delivered through a pipe 68 to the condensate inlet 30of the re-run still 55. The hot residuum from the vapor separator 52'isdelivered through a pipe 69 to the residuum inlet 33. This hot residuumpasses through the tubes 20, giving up a portion of its heat to thecondensate and passingy outwardly through aresiduum outlet pipe 70." Thevarious cuts are delivered through pipes 71, 72 and 73 to suitablecondensers not'shown, the unvaporized portion of the condensate beingdelivered through a pipe 74 which extends up inside the still 55 to apoint just abofe the lower edges of the partitions 21 so that lthe loweredges of thesepartitions are always l submerged and the spaces betweenythe partitions are isolated.

I claim as my invention j .1. A re-run still comprising a shell havingclosed ends, two heads intermediate of said ends forming, with thatportion of the shell between said heads. a distilling. chamber, a seriesof tubes tightly secured in said heads and extending through saiddistilling chamber in the .lower part thereof, means for delivering hotresiduum to the space outside said distilling chamber and inside one endof said shell so that said residuum can flow through said tubes. meansfor withdrawing said residuum from the space outside the oppositeend ofsaid distilling chamber and inside said shell, means for injecting steaminto the bottom of said distilling chamber, means for delivering thecylindrical fluid to be distilled tothe inlet end of said distillingchamber, a series of partitions extending across said distillingchamber-above said tubes,.means for withdrawing vapors from each of theprogressive spaces between said partitions, and means for withdrawingunvaporized liquid from/ the outlet end of said distilling chamber.

2. A re-run still comprising a cylindrical shell having closed ends, twoheads intermediate of said ends forming, with that portion of the shellbetween said heads, distilling chamber, a series of tubes tightlysecured in said heads and extending through said distilling chamber inthe lower part thereof, means for delivering hot residuum to the spaceoutside said distilling chamber and inside one end of said shell so thatsaid residuum can flow through said tubes, means for withdrawing' saidresiduum from the space outside the opposite end of said distillingchamber and insidesaid shell, means for delivering the iiuid to bedistilled to the inlet end of said distilling chamber, a series ofpartitions extending across said distilling chamber above said tube-s,means for withdrawing vapors :trom each of the progressive spacesbetween said partitions, and ,means for withdrawing unvaporized liquidfrom the outlet end of said distilling chamber.

3. A re-run still comprising a cylindrical shell having closed ends, twoheads intermediate of said ends forming, with that portion of the shellbetween said heads, a distilling chamber, a series of tubes tightlysecured in said heads and extending through said distilling chamber inthe lower part thereof, means for delivering hot residuum to the spaceoutside said distilling chamber and inside one end of said shell so thatsaid residuum can flow through' said tubes, means for withdrawing saidresiduum from the space outside the opposite end of said distillingchamber and inside said shell,means for delivering the fluid to bedistilled to the inlet end of said distilling chamber, a series ofpartitions'extending across said distilling chamber abovev said tubes,meansl for withdrawing vapors'from each of the progressive spacesbetween-said partitions, a series of steam pipes, each steam pipeextending into said distilling chamber below one of said progressivespaces, and means for withdrawing unvaporized liquid from the outlet endof said distilling-chamber.

1n testimon whereof, have hereunto set my hand at an'Francisco,California. this 22nd day of August, 1919.

j DANIEL PYZEL.

